main()
{
    int a,b,c,count=0;//lekai
    printf("There are different methods for Xm to distribute books to 3 readers:\n");
    for (a=1;a<=5;a++)
    for (b=1;b<=5;b++)
    for(c=1;a!=b&&c<=5;c++)
    if(c!=a&&c!=b)
    printf(count%8?"%2d:%d,%d,%d":"%2d:%d,%d,%d\n",++count,a,b,c);
}